End plate assembly and battery module

Abstract

The utility model provides an end plate assembly and a battery module, the end plate assembly comprises an insulating end plate, the insulating end plate comprises an inner side surface and an outer side surface which are oppositely arranged along the width direction of the end plate assembly, and the inner side surface of the insulating end plate is arranged close to the end part of a battery pack of the battery module; the reinforcing plate is connected to the outer side surface of the insulating end plate; the shortest distance between the reinforcing plate and the inner side face of the insulating end plate in the width direction of the end plate assembly is set to be not smaller than 10 mm.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an end plate assembly and a battery module. Background Technology

[0002] A battery module includes a battery pack and an end plate for fixing the battery pack. The end plate is designed to protect the individual cells in the battery pack from external impacts and vibrations. In related technologies, the end plate is often made of metal, and an insulating plate is also required between the end plate and the battery pack to meet the insulation withstand voltage performance test of the battery module, making the overall assembly process of the battery module complex. Utility Model Content

[0003] The embodiments of this utility model provide an end plate assembly and a battery module, which can improve the technical problem of complex assembly process of battery modules.

[0004] In a first aspect, embodiments of the present invention provide an end plate assembly for a battery module, the end plate assembly comprising:

[0005] An insulating end plate, the insulating end plate including an inner side and an outer side disposed opposite to each other along the width direction of the end plate assembly, the inner side of the insulating end plate being disposed close to the end of the battery pack of the battery module;

[0006] A reinforcing plate is connected to the outer side of the insulating end plate;

[0007] The shortest distance between the inner sides of the reinforcing plate and the insulating end plate in the width direction of the end plate assembly is set to be no less than 10 mm.

[0008] In one embodiment, the reinforcing plate includes at least one edging portion; the insulating end plate includes a first side and a second side connected between the inner side and the outer side, the first side and the second side each including a first portion of the side near the outer side and a second portion of the side near the inner side; wherein the edging portion covers the first portion of the side, the second portion of the side is exposed outside the edging portion, and the shortest distance between the edging portion and the inner side of the insulating end plate in the width direction of the end plate assembly is set to be not less than 10 mm.

[0009] In one embodiment, the edging portion is arc-shaped, the first part of the side surface is arc-shaped, the first part of the side surface is recessed relative to the second part of the side surface to form a receiving groove, and the edging portion is received in the receiving groove.

[0010] In one embodiment, the battery module further includes at least one fixing strap surrounding the outer side of the battery pack, and the edging portion is used to abut against at least one of the fixing straps; the reinforcing plate includes a main body portion, at least one of the edging portions is connected to the main body portion, and the main body portion is provided with a plurality of limiting protrusions near the edging portion; wherein, each of the fixing straps is located between two of the limiting protrusions, the height of the limiting protrusions protruding relative to the main body portion is not less than the thickness of the fixing strap, and the height of the limiting protrusions protruding relative to the main body portion is 1.5mm to 2.5mm.

[0011] In one embodiment, the reinforcing plate includes at least one folded portion, and the insulating end plate includes a top surface and a bottom surface connected between the inner side surface and the outer side surface; wherein at least one of the top surface and the bottom surface abuts against the folded portion along the height direction of the end plate assembly, and the shortest distance between the folded portion and the inner side surface of the insulating end plate in the width direction of the end plate assembly is set to be not less than 10 mm.

[0012] In one embodiment, the bottom end face of the insulating end plate is provided with a groove, and the folded portion is received in the groove.

[0013] In one embodiment, at least one of the folding portions includes two folding portions, each of the folding portions being provided with a fixing hole; the top surface of the insulating end plate is provided with two mounting grooves; the battery module includes a busbar fixing seat; wherein each of the folding portions is received in a corresponding mounting groove, and the busbar fixing seat is fixed in one of the mounting grooves through the fixing hole of one of the folding portions.

[0014] In one embodiment, the main body is provided with a recessed platform structure, and the outer side of the insulating end plate is provided with a clearance groove, which is configured to accommodate the recessed platform structure.

[0015] In one embodiment, the end plate assembly further includes at least one reinforcing tube installed inside the insulating end plate. The hardness of the reinforcing tube is greater than that of the insulating end plate, and the reinforcing tube is configured to allow the battery module connector to pass through.

[0016] Secondly, embodiments of the present invention provide a battery module, the battery module including a battery pack and two end plate assemblies located at both ends of the battery pack, the battery pack being fixed by the two end plate assemblies, the end plate assemblies being configured as described above.

[0017] The beneficial effects of the embodiments of this utility model are as follows:

[0018] In embodiments of this utility model, by combining an insulating end plate and a reinforcing plate to form an end plate assembly, for example, the insulating end plate is made of plastic and the reinforcing plate is made of metal, and the shortest distance between the inner side of the reinforcing plate and the insulating end plate is set to be no less than 10mm, the battery module can meet the requirements of insulation withstand voltage performance test when the end plate assembly and the battery pack are not using an insulating plate, thereby simplifying the assembly process of the battery module. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the battery module provided in an embodiment of this utility model;

[0021] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0022] Figure 3 This is a perspective view of the end plate assembly provided in an embodiment of the present utility model;

[0023] Figure 4 This is an exploded view of the end plate assembly provided in an embodiment of this utility model;

[0024] Figure 5a This is a top view of the end plate assembly provided in an embodiment of the present utility model;

[0025] Figure 5b This is a bottom view of the end plate assembly provided in an embodiment of this utility model;

[0026] Figure 6 This is a front view of the end plate assembly provided in an embodiment of this utility model;

[0027] Icon labels:

[0028] 100. Battery module;

[0029] 10. End plate assembly;

[0030] 1. Insulating end plate; 111. Inner side; 112. Outer side; 113. Top surface; 114. Bottom surface; 115. First side; 116. Second side; 117. First part side; 118. Second part side; 119. Receiving groove; 12. Limiting groove; 13. Clearance groove; 14. Mounting hole; 15. Wire harness fixing part; 151. Wire harness fixing hole; 16. Mounting groove; 17. Groove;

[0031] 2. Reinforcing plate; 21. Main body; 22. Edge banding; 23. Limiting protrusion; 24. Lifting hole; 25. Sloping platform structure; 26. Folding section; 27. Fixing hole;

[0032] 3. Reinforce the pipe;

[0033] 4. Fixing strap; 41. Insulating sleeve;

[0034] 5. Battery pack;

[0035] 6. Busbar; 61. Busbar mounting bracket; Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] One embodiment of this application provides a battery pack, which may be an energy storage battery pack or a power battery pack. The battery pack includes a housing and at least one battery module, with the at least one battery module disposed inside the housing.

[0038] like Figure 1 and Figure 2 The diagram shows a three-dimensional structural view of a battery module 100 according to an embodiment. The battery module 100 includes a battery pack 5, at least two end plate assemblies 10, a fixing strap 4, and a busbar assembly 6.

[0039] The battery pack 5 includes multiple individual battery cells, which are arranged side by side to form the battery pack 5. The individual battery cells can be cylindrical or prismatic. Taking a prismatic battery cell as an example, the battery cell also includes a positive terminal and a negative terminal disposed on the top surface of the battery cell.

[0040] The number of end plate assemblies 10 is set to at least two. The two end plate assemblies 10 are respectively fixed to the two ends of the battery pack 5. The two end plate assemblies 10 are fixed to the two ends of the battery pack 5 by at least one fixing strap 4.

[0041] The fixing strap 4 is made of steel and works with the end plate assembly 10 to fix the battery pack 5. There are two fixing straps 4, one of which is fixed near the top of the battery pack 5 and the other is fixed near the bottom of the battery pack 5.

[0042] Busbar assembly 6 includes a positive busbar assembly and a negative busbar assembly. The positive busbar assembly includes multiple electrically connected positive connection bars, each connected to the positive terminal of two adjacent cells. The positive connection bar connected to the end of the battery pack serves as the positive output bar, and one end of the positive output bar is fixed to the positive busbar mounting base. The negative busbar assembly includes multiple electrically connected negative connection bars, each connected to the negative terminal of two adjacent cells. The negative connection bar connected to the end of the battery pack serves as the negative output bar, and one end of the negative output bar is fixed to the negative busbar mounting base. Each endplate assembly 10 has two mounting slots 16. The positive busbar fixing seat is fixed in one of the mounting slots 16 of the endplate assembly at one end of the battery pack, and the negative busbar fixing seat is fixed in one of the mounting slots 16 of the endplate assembly at the other end of the battery pack. The positive busbar fixing seat and the negative busbar fixing seat are located at the two ends of one of the cross lines connecting the four ends of the battery pack. The battery module also includes a wiring harness for connecting multiple positive and multiple negative connection bars. Each endplate assembly 10 also has a wiring harness fixing part 15 located between the two mounting slots 16. Each wiring harness fixing part 15 includes a wiring harness fixing hole 151, and the wiring harness is fixed to the wiring harness fixing hole 151 by a cable tie.

[0043] In related technologies, the end plate assembly is set as an end plate made of a single metal material. Suitable end plate materials include aluminum alloys. With the intensification of competition in the new energy industry and the pursuit of cost-effectiveness, there is a need to provide end plates made of high-strength and low-cost materials to reduce the manufacturing cost of battery modules.

[0044] In one embodiment of this application, an endplate assembly 10 is provided, such as Figure 3 The diagram shown is a three-dimensional structural diagram of the end plate assembly 10. Figure 4The diagram shown is an exploded view of the end plate assembly 10, which includes an insulating end plate 1 and a reinforcing plate 2.

[0045] The insulating end plate 1 is made of plastic material, and suitable plastic materials include POM (Polyoxymethylene). POM insulating end plate itself has good mechanical properties, wear resistance and dimensional stability, and at the same time it has high flame retardant properties, thus effectively improving the safety of the battery pack.

[0046] The reinforcing plate 2 is made of metal material, wherein the hardness of the reinforcing plate 2 is greater than that of the insulating end plate 1, and the structural strength of the reinforcing plate 2 is greater than that of the insulating end plate 1. In a specific embodiment, the reinforcing plate 2 includes a base layer and a reinforcing layer. The base layer is made of steel plate, and the reinforcing layer is made of zinc. After the surface of the steel plate is treated with a hot-dip galvanizing process, the zinc layer and the steel plate are tightly bonded, giving the reinforcing plate 2 good rust and corrosion resistance, while also enhancing the strength and durability of the reinforcing plate 2.

[0047] The end plate assembly 10 uses galvanized steel plate as reinforcing plate 2 and POM end plate as insulating end plate 1. The reinforcing plate 2 is bonded to the outer surface of the insulating end plate 1 to form a composite end plate assembly, which can effectively reduce the material cost of the end plate assembly 10. At the same time, the end plate assembly 10 also has high mechanical strength.

[0048] In related technologies, a single end plate made of metal material is used. An insulating plate is usually placed between the end plate and the battery pack to provide insulation and withstand voltage performance.

[0049] Continue to refer to Figures 1 to 4 In some embodiments of this application, the insulating end plate 1 includes opposing inner surfaces 111 and outer surfaces 112, wherein the inner surface 111 of the insulating end plate 1 abuts against the end of the battery pack 5 along the width direction of the end plate assembly, and the reinforcing plate 2 is bonded to the outer surface 112 of the insulating end plate 1. The shortest distance between the reinforcing plate 2 and the inner surface 111 of the insulating end plate 1 along the width direction of the end plate assembly is set to be not less than 10 mm. Figure 1 The x-direction is shown. In specific implementations, the shortest distance between the reinforcing plate 2 and the inner side 111 of the insulating end plate 1 can be 10mm, 11mm, 12mm, 13mm, 15mm, 16mm, 18mm, 20mm, 25mm, 30mm, or any two of the above values, or a range between any two of the above values.

[0050] Understandably, the shortest distance between the reinforcing plate 2 and the inner surface 111 of the insulating end plate 1 is set to be no greater than the shortest distance between the reinforcing plate 2 and the end cell of the battery pack 5. Through research and testing, the inventors discovered that when the shortest distance d between the reinforcing plate 2 and the inner surface 111 of the insulating end plate 1 is set to be no less than 10mm, there is a suitable electrical clearance and creepage distance between the reinforcing plate 2 and the end cell of the battery pack 5. Therefore, no insulating plate is needed between the end plate assembly 10 and the battery pack 5, while still meeting the insulation withstand voltage performance requirements of the battery module. Furthermore, since no insulating plate is needed between the end plate assembly 10 and the battery pack 5, the material cost of the battery module is reduced, and the assembly process of the battery module is effectively simplified, improving assembly efficiency.

[0051] Continue to refer to Figure 2 , Figure 3 and Figure 4 The insulating end plate 1 also includes a first side 115 and a second side 116 opposite to each other. The first side 115 and the second side 116 are connected between the inner side 111 and the outer side 112. Along the length direction of the battery pack 5, the first side 115 and the second side 116 each include a first part side 117 and a second part side 118. The reinforcing plate 2 is provided with two edging portions 22 on both sides. The edging portions 22 are configured to cover the first part side 117, and the second part side 118 is configured to be exposed outside the edging portions 22. The shortest distance between the edging portions 22 and the inner side 111 of the insulating end plate 1 in the width direction of the end plate assembly 10 is set to be not less than 10mm.

[0052] By providing edging portions 22 on both sides of the reinforcing plate 2, the bonding strength between the reinforcing plate 2 and the insulating end plate 1 is improved. The shortest distance between the edging portion 22 and the inner side surface 111 of the insulating end plate 1 in the width direction of the end plate assembly 10 is set to be no less than 10mm. This ensures that the minimum distance between the reinforcing plate 2 and the end of the battery pack 5 is no less than 10mm, and that there is a suitable electrical spacing and creepage distance between the reinforcing plate 2 and the end cells of the battery pack 5. Therefore, there is no need to provide an insulating plate between the end plate assembly 10 and the battery pack 5, which can still meet the insulation withstand voltage performance requirements of the battery module.

[0053] In some specific implementations, the thickness of the second side 118 can be 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, 18mm, 20mm, or any two of the above values. Through research and testing, the inventors discovered that when the thickness of the second side 118 is less than 10mm, the battery module cannot pass the insulation withstand voltage performance test requirements without an insulating sheet between the end plate assembly 10 and the battery pack 5.

[0054] Continue to refer to Figure 3 and Figure 4 The edging portion 22 is arc-shaped, and correspondingly, the first side portion 117 is also arc-shaped. The first side portion 117 is recessed relative to the second side portion 118 to form a receiving groove 119, in which the edging portion 22 is received, allowing the edging portions 22 on both sides of the reinforcing plate 2 to be stably bonded to the first side portion 117 of the insulating end plate 1. A stepped surface is formed at the junction of the first side portion 117 and the second side portion 118, and the edging portion 22 abuts against this stepped surface.

[0055] Continue to refer to Figure 3 and Figure 4 The top and bottom surfaces of the main body 21 of the reinforcing plate 2 are both provided with folded portions 26. These folded portions 26 extend along the width direction of the end plate assembly 10. A portion of the top surface 113 of the insulating end plate 1 abuts against the folded portion 26 of the top surface of the reinforcing plate 2 along the height direction of the end plate assembly. A portion of the bottom surface 114 of the insulating end plate 1 abuts against the folded portion 26 of the bottom surface of the reinforcing plate 2 along the height direction of the end plate assembly 10. The height direction of the end plate assembly is as follows: Figure 1 y direction shown.

[0056] By providing folded portions 26 at the top and bottom surfaces of the reinforcing plate 2, the insulating end plate 1 abuts against the folded portions 26 along the height direction of the end plate assembly 10 during the hoisting process of the battery module, thereby preventing the insulating end plate 1 from falling off the reinforcing plate 2 due to loosening during the hoisting process.

[0057] like Figure 5a and Figure 5b As shown, two folded portions 26 are provided on the top surface of the reinforcing plate 2, and one folded portion 26 is provided on the bottom surface of the reinforcing plate 2. The two folded portions 26 on the top surface of the reinforcing plate 2 are spaced apart. Two mounting grooves 16 are provided on the top surface 113 of the insulating end plate 1. The busbar fixing seat is installed in the mounting groove 16. The insulating end plate 1 also includes a wire harness fixing portion 15 located on the top surface 113, which is located between the two mounting grooves 16. Each folded portion 26 is received in a mounting groove 16, and a fixing hole 27 is provided on the folded portion 26. The busbar fixing seat is fixed through the fixing hole 27.

[0058] Continue to refer to Figure 3 and Figure 4The top surface 113 and bottom surface 114 of the insulating end plate 1 are both provided with grooves 17. The folded portion 26 of the reinforcing plate 2 is accommodated in the groove 17. The shortest distance d2 between the end face of the folded portion 26 and the inner side surface 111 of the insulating end plate 1 in the width direction x of the end plate assembly 10 is set to be not less than 10mm. This ensures that there is a suitable electrical spacing and creepage distance between the reinforcing plate 2 and the end cell of the battery pack 5. Therefore, there is no need to set an insulating plate between the end plate assembly 10 and the battery pack 5, which can also meet the insulation withstand voltage performance requirements of the battery module.

[0059] like Figure 1 and Figure 2 As shown, the battery module 100 includes two end plate assemblies 10, which are fixed to both ends of the battery pack 5 by two fixing straps 4. The two fixing straps 4 are spaced apart along the height direction y of the end plate assembly 10, and each fixing strap 4 is circumferentially fixed to the outer periphery of the battery pack. Both sides of the fixing straps 4 abut against the edge portion 22 of the reinforcing plate 2 and the second side portion 118 of the insulating end plate 1. It is understood that since the reinforcing plate 2, made of metal, is located outside the insulating end plate 1, made of plastic, the compressive force exerted by the fixing straps 4 on the end plate assembly 10 mainly acts on the reinforcing plate 2, thereby effectively preventing the insulating end plate 1 from directly bearing the compressive force of the fixing straps 4 and breaking.

[0060] Continue to refer to Figures 1 to 4 Two edge-wrapping portions 22 are connected to both sides of the main body portion 21 of the reinforcing plate 2. Multiple limiting protrusions 23 are provided on the main body portion 21. Each fixing strap 4 is fixed between two adjacent limiting protrusions 23, thereby preventing the fixing strap 4 from sliding on the outer surface of the reinforcing plate 2 and affecting the stable binding force provided by the fixing strap 4 to the battery pack. The fixing strap 4 is made of steel, and an insulating sleeve 41 is also fitted around the outer periphery of the fixing strap 4. The insulating sleeve 41 provides insulation between the fixing strap 4 and the reinforcing plate 2.

[0061] The height of the multiple limiting protrusions 23 protruding relative to the main body 21 is not less than the thickness of the fixing band 4. The height of the limiting protrusions 23 protruding relative to the main body 21 is 1.5mm to 2.5mm. In specific implementations, the height of the limiting protrusions 23 protruding relative to the main body 21 can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, or any value between any two of the above, or a range between any two of the above values. The height of the limiting protrusions 23 protruding relative to the main body 21 is adaptively adjusted according to the thickness of the fixing band 4.

[0062] A limiting groove 12 is provided on the second part of the side surface 118 of the insulating end plate 1, and the fixing band 4 is received in the limiting groove 12, thereby preventing the fixing band 4 from sliding on the outer surface of the insulating end plate 1 and affecting the stable binding effect of the fixing band 4 on the battery pack.

[0063] Continue to refer to Figure 3 and Figure 4 The main body 21 of the reinforcing plate 2 is provided with a recessed platform structure 25, and the insulating end plate 1 is provided with a clearance groove 13. The recessed platform structure 25 is housed in the clearance groove 13, and the recessed platform structure 25 is basically located in the middle of the main body 21 of the reinforcing plate 2. The recessed platform structure 25 is provided to enhance the structural strength of the reinforcing plate 7 and improve the overall structural strength of the end plate assembly 10.

[0064] Continue to refer to Figure 3 , Figure 4 The end plate assembly 10 also includes at least one reinforcing tube 3, which is installed inside the insulating end plate 1. The reinforcing tube 3 is made of stainless steel and has a higher hardness than the insulating end plate 1. The reinforcing tube 3 is configured to allow the battery module connector to pass through. It is understood that if the battery module connector were directly placed inside the insulating end plate 1 made of plastic material, the battery module connector would damage the insulating end plate 1. By installing the reinforcing tube 3 inside the insulating end plate 1, the battery module connector is placed within the reinforcing tube 3, thus effectively preventing the battery module connector from damaging the end plate assembly 10. Two mounting holes 14 are provided inside the insulating end plate 1, respectively located near the first side 115 and the second side 116 of the insulating end plate 1. Each mounting hole 14 penetrates both the top surface 113 and the bottom surface 114. The insulating end plate 1 includes two reinforcing tubes 3, which are respectively installed within the two mounting holes 14.

[0065] Continue to refer to Figure 4 and Figure 6 The main body 21 of the reinforcing plate 2 is also provided with two lifting holes 24. The two lifting holes 24 are used for lifting tools to lift the battery module. The two lifting holes 24 are located on both sides of the sinking platform structure 25.

[0066] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An endplate assembly for a battery module, characterized in that, include: An insulating end plate, the insulating end plate including an inner side and an outer side disposed opposite to each other along the width direction of the end plate assembly, the inner side of the insulating end plate being disposed close to the end of the battery pack of the battery module; A reinforcing plate is connected to the outer side of the insulating end plate; The shortest distance between the inner sides of the reinforcing plate and the insulating end plate in the width direction of the end plate assembly is set to be no less than 10 mm.

2. The endplate assembly according to claim 1, characterized in that, The reinforcing plate includes at least one edge portion; the insulating end plate includes a first side and a second side connected between the inner side and the outer side, the first side and the second side each including a first portion of the side near the outer side and a second portion of the side near the inner side; wherein the edge portion covers the first portion of the side, the second portion of the side is exposed outside the edge portion, and the shortest distance between the edge portion and the inner side of the insulating end plate in the width direction of the end plate assembly is set to be not less than 10 mm.

3. The end plate assembly according to claim 2, characterized in that, The edging portion is arc-shaped, the first part of the side is arc-shaped, the first part of the side is recessed relative to the second part of the side to form a receiving groove, and the edging portion is received in the receiving groove.

4. The end plate assembly according to claim 3, characterized in that, The battery module further includes at least one fixing strap surrounding the outer side of the battery pack, and the edging portion is used to abut against at least one of the fixing straps; the reinforcing plate includes a main body portion, and at least one edging portion is connected to the main body portion, and the main body portion is provided with a plurality of limiting protrusions near the edging portion; wherein, each fixing strap is located between two limiting protrusions, the height of the limiting protrusions protruding relative to the main body portion is not less than the thickness of the fixing strap, and the height of the limiting protrusions protruding relative to the main body portion is 1.5mm to 2.5mm.

5. The endplate assembly according to any one of claims 1-4, characterized in that, The reinforcing plate includes at least one folded portion, and the insulating end plate includes a top surface and a bottom surface connected between the inner side surface and the outer side surface; wherein at least one of the top surface and the bottom surface abuts against the folded portion along the height direction of the end plate assembly, and the shortest distance between the folded portion and the inner side surface of the insulating end plate in the width direction of the end plate assembly is set to be not less than 10 mm.

6. The endplate assembly according to claim 5, characterized in that, The bottom end face of the insulating end plate is provided with a groove, and the folded part is received in the groove.

7. The endplate assembly according to claim 5, characterized in that, At least one of the folding portions includes two folding portions, each of the folding portions being provided with a fixing hole; the top surface of the insulating end plate is provided with two mounting grooves; the battery module includes a busbar fixing seat; wherein each of the folding portions is received in a corresponding mounting groove, and the busbar fixing seat is fixed in one of the mounting grooves through the fixing hole of one of the folding portions.

8. The endplate assembly according to any one of claims 1-4, characterized in that, The reinforcing plate is provided with a recessed platform structure, and the outer side of the insulating end plate is provided with a clearance groove, which is configured to accommodate the recessed platform structure.

9. The endplate assembly according to any one of claims 1-4, characterized in that, The end plate assembly also includes at least one reinforcing tube, which is installed inside the insulating end plate. The hardness of the reinforcing tube is greater than that of the insulating end plate, and the reinforcing tube is configured to allow the battery module connector to pass through.

10. A battery module, characterized in that, The battery module includes a battery pack and two end plate assemblies located at both ends of the battery pack. The battery pack is fixed by the two end plate assemblies, and the end plate assemblies are configured as the end plate assemblies according to any one of claims 1-9.

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